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support rusage parameter of wait4

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refs #857
This commit is contained in:
Tomoki Shirasawa
2017-06-02 14:05:01 +09:00
committed by Balazs Gerofi
parent a66fb96cd9
commit edf059888d
2 changed files with 29 additions and 10 deletions
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5
kernel/include/syscall.h
View File

@ -428,6 +428,11 @@ static inline void tsc_to_ts(unsigned long tsc, struct timespec *ts)
}
}
static inline unsigned long timeval_to_jiffy(const struct timeval *ats)
{
return ats->tv_sec * 100 + ats->tv_usec / 10000;
}
static inline unsigned long timespec_to_jiffy(const struct timespec *ats)
{
return ats->tv_sec * 100 + ats->tv_nsec / 10000000;

34
kernel/syscall.c
View File

@ -426,6 +426,13 @@ struct thread *find_thread_of_process(struct process *child, int pid)
return c_thread;
}
static void
set_process_rusage(struct process *proc, struct rusage *usage)
{
ts_to_tv(&usage->ru_utime, &proc->utime);
ts_to_tv(&usage->ru_stime, &proc->stime);
usage->ru_maxrss = proc->maxrss / 1024;
}
/*
* From glibc: INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL);
@ -485,6 +492,7 @@ do_wait(int pid, int *status, int options, void *rusage)
proc->maxrss_children = child->maxrss;
if(child->maxrss_children > proc->maxrss_children)
proc->maxrss_children = child->maxrss_children;
set_process_rusage(child, rusage);
mcs_rwlock_writer_unlock_noirq(&proc->update_lock, &updatelock);
list_del(&child->siblings_list);
mcs_rwlock_writer_unlock_noirq(&proc->children_lock, &lock);
@ -606,14 +614,18 @@ SYSCALL_DECLARE(wait4)
void *rusage = (void *)ihk_mc_syscall_arg3(ctx);
int st;
int rc;
struct rusage usage;
if(options & ~(WNOHANG | WUNTRACED | WCONTINUED | __WCLONE)){
dkprintf("wait4: unexpected options(%x).\n", options);
return -EINVAL;
}
rc = do_wait(pid, &st, WEXITED | options, rusage);
memset(&usage, '\0', sizeof usage);
rc = do_wait(pid, &st, WEXITED | options, &usage);
if(rc >= 0 && status)
copy_to_user(status, &st, sizeof(int));
if (rusage)
copy_to_user(rusage, &usage, sizeof usage);
return rc;
}
@ -626,6 +638,7 @@ SYSCALL_DECLARE(waitid)
int pid;
int status;
int rc;
struct rusage usage;
if(idtype == P_PID)
pid = id;
@ -643,7 +656,8 @@ SYSCALL_DECLARE(waitid)
dkprintf("waitid: no waiting status(%x).\n", options);
return -EINVAL;
}
rc = do_wait(pid, &status, options, NULL);
memset(&usage, '\0', sizeof usage);
rc = do_wait(pid, &status, options, &usage);
if(rc < 0)
return rc;
if(rc && infop){
@ -652,6 +666,10 @@ SYSCALL_DECLARE(waitid)
info.si_signo = SIGCHLD;
info._sifields._sigchld.si_pid = rc;
info._sifields._sigchld.si_status = status;
info._sifields._sigchld.si_utime =
timeval_to_jiffy(&usage.ru_utime);
info._sifields._sigchld.si_stime =
timeval_to_jiffy(&usage.ru_stime);
if((status & 0x000000ff) == 0x0000007f)
info.si_code = CLD_STOPPED;
else if((status & 0x0000ffff) == 0x0000ffff)
@ -865,6 +883,10 @@ terminate(int rc, int sig)
CLD_DUMPED: CLD_KILLED): CLD_EXITED;
info._sifields._sigchld.si_pid = proc->pid;
info._sifields._sigchld.si_status = exit_status;
info._sifields._sigchld.si_utime =
timespec_to_jiffy(&proc->utime);
info._sifields._sigchld.si_stime =
timespec_to_jiffy(&proc->stime);
error = do_kill(NULL, proc->parent->pid, -1, SIGCHLD, &info, 0);
dkprintf("terminate,klll %d,error=%d\n",
proc->termsig, error);
@ -2280,14 +2302,6 @@ SYSCALL_DECLARE(set_tid_address)
return cpu_local_var(current)->proc->pid;
}
/*
static unsigned long
timespec_to_jiffy(const struct timespec *ats)
{
return ats->tv_sec * 100 + ats->tv_nsec / 10000000;
}
*/
SYSCALL_DECLARE(times)
{
struct tms {